Question: According to Theodora's birthdate, was Gregorian born earlier than 1584?
Paraphrase: Was Gregorian born earlier than 1584, according to Theodora's birthdate?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q204843 p:P569 ?s . ?s ps:P569 ?obj . ?s pq:P31 wd:Q26961029 }